Maths Olympiad

You can find me on AoPS as gghx.¹

Proposals

• SMO Senior 2025 Q2 (see here)
• SMO Senior 2025 Q3

Awards

• International Mathematical Olympiad: Gold (2023), Silver (2022)
• Asian Pacific Mathematical Olympiad: Silver (2023, 2022)
• China Mathematical Olympiad: Gold (2022)
• Singapore Mathematical Olympiad: National 1st (2023, 2022)

In 2022, I had a brief but deep foray into the world of Informatics Olympiads, culminating in a gold medal at the National Olympiad in Informatics.

Projects

SEIF (Strange Equations Involving Functions) is a project I organised, with the aim of proposing high quality functional equations to use as a contest. It led to some of the best FEs in that time.² This follows a similar project I was heavily involved in, IFEO.

A document detailing my experience at the 64th IMO held in Chiba, Japan.

A compilation of my favourite functional equations.

A concise list of theorems and results I have amassed, which I review the night before every major contest (including both IMOs). It deliberately does not include any theorem I’ve never used.

Recommendations

Here’s a list of less well-known material I’ve used. You can easily find the well-known ones online.

• Canada’s IMO Camps (focus on the recent ~5 years): an amazing collection of handouts and problems covering basically every topic. This is perfect for anyone trying to bridge the gap between IMO bronze and IMO silver (i.e. solving P2/5).
• M Ahsan Al Mahir’s Journal of MO: for anyone who wishes to find problems from a specific sub-topic. I also used this to check which areas of MO I have been neglecting.

Handouts

My favourite type of handouts are those which comprehensively cover an entire topic, from the basics to the most advanced theory, complete with a surplus of examples and tips. It’s the kind of handout where you finish it and never have to return to study the topic ever again. Here are some of them:

Algebra

• Rohan Goyal’s Polynomials
• Pang-Cheng Wu’s Functional Equation
• Samin Riasat’s Basics of Olympiad Inequalities

Combinatorics

• Howard Halim’s Algorithm
• Evan Chen’s Probabilistic Method

Geometry

• Albert Zhu’s Power of a Point
• i3435’s Config Geometry
• Orestis Lignos’ Trigo Bash³
• Jafet98’s On Mixtilinear Incircles
• Carl Joshua Quines’ Pascal’s Theorem
• AwesomeMath’s Humpty Point
• The Method of Animation

Number Theory

• Aditya Khurmi’s MONT⁴
• Yimin Ge’s Vieta Jumping

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1. I have a blog there which I no longer maintain. Please refrain from messaging me on AoPS as I don’t check it frequently. ↩︎
2. In my opinion, of course. Fun fact, N1 of SEIF appeared as P6 in a national olympiad. ↩︎
3. Not the actual name, which is a mouthful. ↩︎
4. Yea, that covers everything. ↩︎